Decode RAM designation - The interactive memory product ID guide ...




v 1.0 


DDR, DDR2 and DDR3 memory modules can be overclocked very simple over the BIOS to get a better PC performance.
We have already tested several memory modules regarding the maximum overclocking result in the hardware test section,
but memory modules are equipped with different RAM chips, so the RAM overclocking results can differ.
Depending upon production it is possible that high-end ICs are used on inexpensive memory modules which are underclocked on standard settings.
For this reason there are extensive discussions in some forums about the respective RAM chip used on memory modules.
A well-known example is e.g. the designation D9GMH of the memory manufacturer Micron, which can be enormously overclocked.

But what does this frequently mentioned part marking like e.g. Micron D9GMH, D9HNH, etc. exactly mean and
how can one discover on basis of the part number how much megabyte or gigabyte memory RAM modules have?
For these questions I have build this new Script to calculate and decode the RAM designation,
which is already available in similar form for AMD Athlon64, AMD SocketA and for Intel processors.

In the version 1.0 the most common DDR, DDR2 and DDR3 Micron ICs are already integrated for decoding and
of course more manufacturers and other enhancements will follow soon.
We have already an extensive RAM topic with several RAM overclocking results in our hardware forum
and we look forward to your memory module results and/or experiences.


Handling of the interactive memory product id guide:

The interactive memory product ID guidance is very easy to handle:
Simply select the RAM IC part number and the assembly - single sided = 8 (/9 ECC) or double sided = 16 (/18 ECC) ICs - over the drop down fields.
Then you will see all important technical data and the description in the virtual RAM chip picture.
DDR xyz / PC xyz stand for DDR, DDR-2 and DDR-3 modules, as you will find those chips on different memory module types.
Additionally you will see calculated performance values for CAS latency (CL) in relation to the frequency,
but these values can give only a rough estimated reference point.


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Important information about the technical data of memory modules:

The maximum possible frequency depends on timings and/or the CAS Latency.
For example PC2-4200 chips will be used e.g. on PC2-6400 modules with slower timings.
Of course not all calculated values are practicable, since memory module chips are designed for different clock rates and timings.
With an increasement of the standard memory voltage (e.g. 1.8 V for DDR2) it is possible to reach higher speeds and
memory manufacturers offers high-end overclocking modules for example with 2.00 V up to 2.30 V to achieve higher clock rates and timings.


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